Multi-wavelength ultrasonic standing wave device for non-invasive cell manipulation and characterisation

2011 ◽  
Author(s):  
Yongqiang Qiu ◽  
Christine Demore ◽  
Srikanta Sharma ◽  
Sandy Cochran ◽  
David A. Hughes ◽  
...  
Keyword(s):  
Standing Wave ◽  
Cell Manipulation ◽  
Non Invasive ◽  
Ultrasonic Standing Wave ◽  
Multi Wavelength ◽  
Invasive Cell ◽  
Wave Device

Cell manipulation in ultrasonic standing wave fields

2007 ◽  
Vol 44 (1) ◽  
pp. 43-62 ◽  
Author(s):  
W. Terence Coakley ◽  
David W. Bardsley ◽  
Martin A. Grundy ◽  
Freidoun Zamani ◽  
David J. Clarke
Keyword(s):  
Standing Wave ◽  
Cell Manipulation ◽  
Wave Fields ◽  
Ultrasonic Standing Wave

Cell Manipulation by an Ultrasonic Standing Wave for Spectroscopy Purposes

2011 ◽  
Vol 37 (8) ◽  
pp. S61
Author(s):  
S. Radel ◽  
C. Koch ◽  
M. Brandstetter ◽  
B. Lendl
Keyword(s):  
Standing Wave ◽  
Cell Manipulation ◽  
Ultrasonic Standing Wave

scholarly journals Mathematical modeling and experimental study on solid–liquid suspension separation in ultrasonic standing wave field

2021 ◽  
pp. 146134842110229
Author(s):  
Yajing Wang ◽  
Liqun Wu ◽  
Yaxing Wang ◽  
Yafei Fan
Keyword(s):  
Standing Wave ◽  
Sound Pressure ◽  
Acoustic Radiation ◽  
Sound Field ◽  
Radiation Force ◽  
High Energy ◽  
Factors Affecting ◽  
Liquid Suspension ◽  
Ultrasonic Standing Wave ◽  
Solid Liquid

A new method of removing waste chips is proposed by focusing on the key factors affecting the processing quality and efficiency of high energy beams. Firstly, a mathematical model has been established to provide the theoretical basis for the separation of solid–liquid suspension under ultrasonic standing wave. Secondly, the distribution of sound field with and without droplet has been simulated. Thirdly, the deformation and movement of droplets are simulated and tested. It is found that the sound pressure around the droplet is greater than the sound pressure in the droplet, which can promote the separation of droplets and provide theoretical support for the ultrasonic suspension separation of droplet; under the interaction of acoustic radiation force, surface tension, adhesion, and static pressure, the droplet is deformed so that the gas fluid around the droplet is concentrated in the center to achieve droplet separation, and the droplet just as a flat ball with a central sag is stably suspended in the acoustic wave node.

scholarly journals Methodology: non-invasive monitoring system based on standing wave ratio for detecting water content variations in plants

Plant Methods ◽  
2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Yunjeong Yang ◽  
Ji Eun Kim ◽  
Hak Jin Song ◽  
Eun Bin Lee ◽  
Yong-Keun Choi ◽  
...  
Keyword(s):  
Water Content ◽  
Monitoring System ◽  
Standing Wave ◽  
Magnetic Particles ◽  
Experimental Plant ◽  
Invasive Monitoring ◽  
Monitoring Method ◽  
Non Invasive ◽  
Content Variation ◽  
Stem Water

Abstract Background Water content variation during plant growth is one of the most important monitoring parameters in plant studies. Conventional parameters (such as dry weight) are unreliable; thus, the development of rapid, accurate methods that will allow the monitoring of water content variation in live plants is necessary. In this study, we aimed to develop a non-invasive, radiofrequency-based monitoring system to rapidly and accurately detect water content variation in live plants. The changes in standing wave ratio (SWR) caused by the presence of stem water and magnetic particles in the stem water flow were used as the basis of plant monitoring systems. Results The SWR of a coil probe was used to develop a non-invasive monitoring system to detect water content variation in live plants. When water was added to the live experimental plants with or without illumination under drought conditions, noticeable SWR changes at various frequencies were observed. When a fixed frequency (1.611 GHz) was applied to a single experimental plant (Radermachera sinica), a more comprehensive monitoring, such as water content variation within the plant and the effect of illumination on water content, was achieved. Conclusions Our study demonstrated that the SWR of a coil probe could be used as a real-time, non-invasive, non-destructive parameter for detecting water content variation and practical vital activity in live plants. Our non-invasive monitoring method based on SWR may also be applied to various plant studies.

AlGaN/GaN heterostructures for non-invasive cell electrophysiological measurements

2007 ◽  
Vol 23 (4) ◽  
pp. 513-519 ◽  
Author(s):  
Jinjiang Yu ◽  
Shrawan Kumar Jha ◽  
Lidan Xiao ◽  
Qingjun Liu ◽  
Ping Wang ◽  
...  
Keyword(s):  
Non Invasive ◽  
Electrophysiological Measurements ◽  
Invasive Cell

scholarly journals Design and Analysis of a Continuous and Non-Invasive Multi-Wavelength Optical Sensor for Measurement of Dermal Water Content

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2162
Author(s):  
Mohammad Mamouei ◽  
Subhasri Chatterjee ◽  
Meysam Razban ◽  
Meha Qassem ◽  
Panayiotis A. Kyriacou
Keyword(s):  
Water Content ◽  
Optical Sensor ◽  
Broad Band ◽  
Gravimetric Analysis ◽  
Skin Damage ◽  
Biophysical Parameter ◽  
Non Invasive ◽  
Multi Wavelength ◽  
Invasive Measurement

Dermal water content is an important biophysical parameter in preserving skin integrity and preventing skin damage. Traditional electrical-based and open-chamber evaporimeters have several well-known limitations. In particular, such devices are costly, sizeable, and only provide arbitrary outputs. They also do not permit continuous and non-invasive monitoring of dermal water content, which can be beneficial for various consumer, clinical, and cosmetic purposes. We report here on the design and development of a digital multi-wavelength optical sensor that performs continuous and non-invasive measurement of dermal water content. In silico investigation on porcine skin was carried out using the Monte Carlo modeling strategy to evaluate the feasibility and characterize the sensor. Subsequently, an in vitro experiment was carried out to evaluate the performance of the sensor and benchmark its accuracy against a high-end, broad band spectrophotometer. Reference measurements were made against gravimetric analysis. The results demonstrate that the developed sensor can deliver accurate, continuous, and non-invasive measurement of skin hydration through measurement of dermal water content. Remarkably, the novel design of the sensor exceeded the performance of the high-end spectrophotometer due to the important denoising effects of temporal averaging. The authors believe, in addition to wellbeing and skin health monitoring, the designed sensor can particularly facilitate disease management in patients presenting diabetes mellitus, hypothyroidism, malnutrition, and atopic dermatitis.

scholarly journals Temperature-controlled MPa-pressure ultrasonic cell manipulation in a microfluidic chip

Lab on a Chip ◽  
2015 ◽  
Vol 15 (16) ◽  
pp. 3341-3349 ◽  
Author(s):  
Mathias Ohlin ◽  
Ida Iranmanesh ◽  
Athanasia E. Christakou ◽  
Martin Wiklund
Keyword(s):  
Lung Cancer ◽  
High Pressure ◽  
Cancer Cells ◽  
Microfluidic Chip ◽  
Acoustic Streaming ◽  
Cell Manipulation ◽  
Wave Trapping ◽  
Ultrasonic Standing Wave ◽  
Temperature Controlled

We study the effect of 1 MPa-pressure ultrasonic-standing-wave trapping of cells during one hour in a fully temperature- and acoustic streaming-controlled microfluidic chip, and conclude that the viability of lung cancer cells are not affected by this high-pressure, long-term acoustophoresis treatment.

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